It's impossible! Reversing the hyperspace engines could cause the telerium crystals to implode on themselves thereby creating a black-hole in sub-space! It's madness Mr. Gebal, the engines just can't take that kind of pressure!

...ok...waaaayyyy to much star trek for me

But yeah, in all seriousness. Grade A impossible to mod a 3.5mm audio output jack to become a 3.5mm Line in.

__________________"How selfish soever man may be supposed, there are evidently some principles in his nature, which interest him in the fortunes of others, and render their happiness necessary to him, though he derives nothing from it..." - Adam Smith